Wire The Thermostat - Honeywell CT87A round Installation Instructions Manual

CT87A,B,J ROUND® THERMOSTAT
6

Wire the thermostat

1. Use the wiring cross-reference table below to match each old
thermostat wire with its corresponding terminal on the CT87 wallplate
or subbase. See Figs. 8–13 for wiring diagrams.
2. Strip the wire insulation as needed to fit the wires underneath the ter-
minal screws (Fig. 7).
3. Loosen the terminal screws and slip each wire beneath its matching
terminal.
4. Securely tighten the terminal screws.
5. Push any excess wire back into the wall.
69-0274-5
Wiring cross-reference
Connect to
Wire label CT87A
R, RH, 4, V R
Rc, R
W, W , H W
1
Y, Y , M Y
1
G, F
B See Fig. 9
O
See Fig. 13
*Never attach wires to both the B and O terminals.
Fig. 7
FOR STRAIGHT
CONNECTION—
STRIP 5/16 in. [8 mm]
6
Connect to Connect to
CT87B
RH R
Rc
W W
Y Y
G G
B*
O*
P
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 in. [11 mm]
BARRIER
M1279
CT87J